KR20220134654A - Methods for manufacturing rotating tools and cutting components - Google Patents

Abstract

A rotary tool based on a non-limiting aspect of the present disclosure has a holder and a cutting insert. The cutting insert has an upper surface having a first upper side, a lower surface having a first lower side, and a side surface. The side surface has a first side surface located on the side of the tip, a second side surface located on the outer peripheral side of the holder, and a third side surface located on the inner peripheral side of the holder. The first upper side has a convex shape protruding toward the front end, and has a first end. The first end is located closer to the third side than the second side. The first lower side has a convex shape protruding toward the front end, and has a second end. The second end is located closer to the second side than the third side. When viewed from the front of the upper surface, the first side surface has a tip region sandwiched between the first end and the second end, and the tip region is recessed toward the rear end.

Description

Methods for manufacturing rotating tools and cutting components

(Cross-reference to related applications)

This application claims the priority of Japanese Patent Application No. 2020-054294 for which it applied on March 25, 2020, The whole indication of this previous application is taken in here for reference.

TECHNICAL FIELD The present disclosure relates generally to a rotating tool used for cutting a workpiece and a method for manufacturing a cutting work. More specifically, it relates to a cutting tool used for phrasing and the like.

As a rotary tool (cutting tool) used when cutting work materials, such as metal, for example, International Publication No. 2010/114094 (Patent Document 1), International Publication No. 2015/174200 (Patent Document 2) and Japanese Patent The cutting tool described in publication 2010-523352 (patent document 3) is known. The cutting tool of patent document 3 has a cutting insert. This cutting insert has two end faces (upper face and lower face), a peripheral face, and a cutting edge (upper cutting edge and a lower cutting edge) formed at the intersection of the end face and the peripheral face. The cutting edge has a convex shape protruding toward the tip of the rotation axis, and has a main cutting edge positioned outside the convex edge portion and a sub cutting edge positioned inside. The peripheral surface has a region connecting the end portion of the upper cutting edge and the end portion of the lower cutting edge. This region is linearly connecting the two ends. Therefore, when the cutting insert is viewed from the top, the outer peripheral edge connecting the two ends is linear.

When cutting is performed using the cutting tool described in Reference 3, it is necessary to set the axial rake to a large negative value in order to avoid that the region in the peripheral surface comes into contact with the workpiece. That is, it is necessary to greatly advance the cutting insert. However, when the cutting insert is largely tilted, there is a risk that the machinability may decrease.

A rotary tool based on one non-limiting aspect of the present disclosure is a rotary tool that extends from a rear end to a front end along a rotation axis, has a cylindrical shape extending along the rotation axis, and has a pocket located on the side of the front end It has a holder and a cutting insert positioned in the pocket. The cutting insert is positioned in front of the rotational direction of the rotating shaft and has an upper surface having a first upper side located on the side of the tip, and located on the opposite side of the upper surface and located on the side of the tip It has a lower surface having a first lower edge, a side surface positioned between the upper surface and the lower surface, an upper cutting edge positioned on the first upper edge, and a lower cutting edge positioned on the first lower edge. The side surface has a first side surface located on the side of the tip, a second side surface located on the outer peripheral side of the holder, and a third side surface located on the inner peripheral side of the holder. The first upper side has a convex shape protruding toward the tip, and has a first end positioned on the side of the tip. The first end is located closer to the third side than the second side. The first lower side has a convex shape protruding toward the tip, and has a second end positioned on the side of the tip. The second end is located closer to the second side than the third side. When viewed from the front of the upper surface, the first side surface has a front end area sandwiched between the first end and the second end, and the front end area is recessed toward the rear end.

1 is a perspective view showing a rotating tool of one side, which is not limited by the present disclosure.
It is the top view which looked at the rotary tool shown in FIG. 1 from the side of the front-end|tip.
It is the side view which looked at the rotary tool shown in FIG. 2 from A1 direction.
FIG. 4 is an enlarged view of the area B1 shown in FIG. 1 .
FIG. 5 is an enlarged view of an area B2 shown in FIG. 3 .
It is a perspective view which shows the cutting insert in the rotary tool shown in FIG.
It is the top view which looked at the cutting insert shown in FIG. 6 from the upper surface.
It is the top view which looked at the cutting insert shown in FIG. 6 from the upper surface.
It is the top view which looked at the cutting insert shown in FIG. 6 from the lower surface.
It is the side view which looked at the cutting insert shown in FIG. 8 from A2 direction.
It is the side view which looked at the cutting insert shown in FIG. 8 from A3 direction.
Fig. 12 is a cross-sectional view taken along section XII-XII shown in Fig. 8 .
Fig. 13 is a cross-sectional view taken along section XIII-XIII shown in Fig. 8 .
14 is a schematic diagram showing one step in the method for manufacturing a cut product of one surface, which is not limited by the present disclosure.
15 is a schematic diagram showing one step in the method for manufacturing a cut product of one surface, which is not limited by the present disclosure.
Fig. 16 is a schematic view showing one step in the method for manufacturing a cut product of one surface, which is not limited by the present disclosure;

<Rotation tool>

Hereinafter, the rotating tool 1 of one surface which is not limited by this indication is demonstrated in detail using drawings. However, in each figure referred to below, for convenience of description, only the main member necessary for demonstrating embodiment is simplified and shown. Accordingly, the rotary tool 1 may have any constituent members not shown in the referenced angles. In addition, the dimensions of the members in each figure do not faithfully represent the dimensions of an actual structural member, the dimensional ratio of each member, etc.

The rotary tool 1 may extend from the rear end 1a to the front end 1b along the rotation axis O1 as in the non-limiting example shown in FIGS. 1 to 5 . This rotary tool 1 may be rotatable about the rotary axis O1. In addition, the rotary tool 1 may be a grinding tool used for phrasing etc. In addition, arrow Y1 in FIG. 1 etc. has shown the rotation direction of the rotating shaft O1.

The rotary tool 1 may have a holder 3 and a cutting insert 5 (hereinafter, sometimes referred to as "insert 5").

The holder 3 may have a cylindrical shape extending along the rotation axis O1. The cylindrical shape may be a substantially cylindrical shape, and does not need to be a cylindrical shape in a strict sense. Moreover, the holder 3 may have the pocket 7 located at the side of the front-end|tip 1b. The pocket 7 may be a portion where the insert 5 can be attached. You may open the pocket 7 in the outer peripheral surface of the holder 3, and the end surface on the side of the front-end|tip 1b.

The insert 5 may be located in the pocket 7 . In addition, only one pocket 7 may be sufficient, and a plurality may be sufficient as it. As in the non-limiting example shown in FIG. 2 , when the holder 3 has a plurality of pockets 7 , the rotary tool 1 may have a plurality of inserts 5 , and each pocket 7 . Inserts (5) may be positioned one at a time.

When the holder 3 has a plurality of pockets 7, these pockets 7 may be located at equal intervals around the rotation shaft O1, or may be located at unequal intervals.

The holder 3 is not limited to a specific size. For example, the length of the holder 3 in the direction along the rotation axis O1 may be set to about 60-300 mm. In addition, the width (diameter) of the holder 3 in the direction orthogonal to the rotating shaft O1 may be set to about 8-40 mm.

The insert 5 may have an upper surface 9 , a lower surface 11 , a side surface 13 , an upper cutting edge 15 , and a lower cutting edge 17 , as in the non-limiting example shown in FIGS. 6 to 13 . good night. In addition, the upper surface 9 and the lower surface 11 are expressions for convenience, and do not show the upper and lower directionality. For example, the upper surface 9 need not face upward when using the insert 5 . These points are the same also in other parts including the expression of top and bottom.

The upper surface 9 may be located in front of the rotational direction Y1 of the rotational shaft O1 like an example not limited to shown in FIG. 2 . Further, the upper surface 9 may have a polygonal shape. The upper surface 9 may have a substantially rectangular shape (rectangular shape) like an example not limited to shown in FIG. 6 .

The lower surface 11 may be located on the opposite side of the upper surface 9 . Also, the lower surface 11 may have a polygonal shape similar to the upper surface 9 . The lower surface 11 may have a substantially rectangular shape (rectangular shape). In addition, the insert 5 may have a polygonal plate shape. The insert 5 may have a square plate shape.

In addition, the polygonal shape does not have to be strictly a polygonal shape. For example, the plurality of sides of the upper surface 9 may not be strictly straight lines, respectively, and may be curved when viewed from the front of the upper surface 9 (viewed from the upper surface). In addition, the angle of the upper surface 9 located between the mutually adjacent sides may not be a strict angle. In other words, the plurality of angles in the upper surface 9 may not be strict angles. When the upper surface 9 is seen from the front, a convex curve shape may be sufficient as an angle|corner, and the shape which combined a straight line and a curve may be sufficient as it.

The plurality of sides of the upper surface 9 may include the first upper side 19 . That is, the upper surface 9 may have the first upper side 19 . The first upper side 19 may be located on the side of the tip 1b. When the upper surface 9 has a rectangular shape having a long side and a short side, the first upper side 19 may have a short side.

The plurality of sides of the lower surface 11 may include the first lower side 21 . That is, the lower surface 11 may have the 1st lower side 21 . The first lower side 21 may be located on the side of the tip 1b. When the lower surface 11 has a rectangular shape having a long side and a short side, the first lower side 21 may have a short side.

An imaginary straight line passing through the center of the upper surface 9 and the center of the lower surface 11 may be the central axis O2 of the insert 5 . When the upper surface 9 is rectangular, the intersection of the diagonals on the upper surface 9 may be the center of the upper surface 9 . Similarly, when the lower surface 11 is quadrangular, it is good also considering the intersection of the diagonals in the lower surface 11 as the center of the lower surface 11. As shown in FIG. The starting point of the diagonal line may be a portion where the extension lines of each side constituting the rectangular shape intersect.

In addition, the shape of the upper surface 9 and the lower surface 11 is not limited to a rectangular shape, Other shapes may be sufficient. As another shape, a triangle, a pentagon, a hexagon, an octagon, etc. are mentioned, for example. When the upper surface 9 is not rectangular, the center of the upper surface 9 may be specified, for example, by the central position of the upper surface 9 when the upper surface 9 is viewed from the front. Similarly, when the lower surface 11 is not rectangular, the center of the lower surface 11 is determined by the central position of the lower surface 11 in the case where the lower surface 11 is viewed from the front (viewed from the lower surface), for example. You may specify

When the upper surface 9 is viewed from the front, the upper surface 9 may be 180° rotationally symmetric about the central axis O2. In addition, when the lower surface 11 is seen from the front, the lower surface 11 may be rotational symmetry of 180 degrees centering on the central axis O2.

The insert 5 is not limited to a specific size. For example, the maximum width in the case where the upper surface 9 is viewed from the front may be set to about 6 to 25 mm. In addition, the height from the upper surface 9 to the lower surface 11 may be set to about 1-10 mm. The height from the upper surface 9 to the lower surface 11 may mean the maximum value of the space|interval in the direction parallel to the central axis O2 in between the upper surface 9 and the lower surface 11. As shown in FIG. In addition, the height from the upper surface 9 to the lower surface 11 may be changed to the width|variety of the side surface 13 in the direction along the central axis O2.

The side surface 13 may be located between the upper surface 9 and the lower surface 11 . The side surface 13 may be connected to the upper surface 9 and the lower surface 11 like a non-limiting example shown in FIG.

The upper cutting edge 15 may be located on the first upper side 19 . The upper cutting edge 15 can be used to cut a workpiece when manufacturing a cutting work using the insert 5 . The upper cutting edge 15 may be positioned on the whole of the first upper edge 19 , or may be positioned only on a part of the first upper edge 19 .

When the insert 5 has an upper cutting edge 15 , one of the upper surface 9 and the side surface 13 may have a rake surface area, and the other one of the upper surface 9 and the side surface 13 may be It may have a flank surface area. As in the non-limiting example shown in FIG. 6 , the upper surface 9 may have a rake surface area, and the side surface 13 may have a flank surface area.

The lower cutting edge 17 may be located on the first lower edge 21 . Like the upper cutting edge 15 , the lower cutting edge 17 can be used to cut a workpiece when manufacturing a cutting work using the insert 5 . The lower cutting edge 17 may be located on the whole of the first lower side 21 , or may be located only on a part of the first lower side 21 . Further, when the insert 5 has an upper cutting edge 15 and a lower cutting edge 17, the insert 5 may be of a double-sided specification.

Here, the side surface 13 may have a first side surface 23 , a second side surface 25 , and a third side surface 27 . The first side surface 23 may be located on the side of the tip 1b. When manufacturing a cutting work using the upper cutting edge 15 , the second side surface 25 may be located on the outer peripheral side of the holder 3 . When manufacturing a cutting work using the upper cutting edge 15 , the third side surface 27 may be located on the inner peripheral side of the holder 3 . In addition, the second side surface 25 and the third side surface 27 may be located along the rotation axis O1. The third side surface 27 may be located on the opposite side of the second side surface 25 .

When manufacturing a cutting work using the lower cutting edge 17, the insert 5 is placed in the holder 3 in an inverted state compared to when manufacturing a cutting work using the upper cutting edge 15. may be installed. Therefore, when manufacturing a cut product using the lower cutting edge 17 , the third side surface 27 may be located on the outer peripheral side of the holder 3 . In addition, when manufacturing a cutting work using the lower cutting edge 17, the 2nd side surface 25 may be located in the inner peripheral side of the holder 3 .

The first upper side 19 may have a convex shape protruding toward the tip 1b. In addition, the first upper edge 19 may have a first end 19a located on the side of the tip 1b. More specifically, the first upper edge 19 may have a first end 19a positioned on the side of the most tip 1b of the first upper edge 19 . In addition, the first end 19a may be located closer to the third side surface 27 than the second side surface 25 . In other words, the interval between the first end 19a and the third side surface 27 may be smaller than the interval between the first end 19a and the second side surface 25 .

The portion of the upper cutting edge 15 located near the first end 19a is a bottom blade positioned along the machining surface (finished surface) of the workpiece when manufacturing a cutting work using the upper cutting edge 15 . It is possible to use it as The portion of the upper cutting edge 15 that extends from the first end 19a to the second side surface 25 is a so-called so-called work piece that is mainly processed when a cutting work is manufactured using the upper cutting edge 15 . It is possible to use it as the main cutting edge. The portion of the upper cutting edge 15 that extends from the first end 19a to the third side surface 27 is not used as a bevel penetration blade when performing an inclined penetration machining using the upper cutting edge 15. It is possible.

The first lower side 21 may have a convex shape protruding toward the tip 1b. Further, the first lower side 21 may have a second end 21a located on the side of the tip 1b. More specifically, the first lower edge 21 may have a second end 21a positioned on the side of the most tip 1b of the first lower edge 21 . In addition, the second end 21a may be located closer to the second side surface 25 than the third side surface 27 . In other words, the interval between the second end 21a and the second side surface 25 may be smaller than the interval between the second end 21a and the third side surface 27 .

The portion of the lower cutting edge 17 located near the second end 21a is a bottom blade positioned along the machining surface (finishing surface) of the workpiece when manufacturing a cutting work using the lower cutting edge 17 . It is possible to use it as A portion of the lower cutting edge 17 that extends from the second end 21a to the third side surface 27 is a so-called so-called work-piece that is mainly processed when a workpiece is manufactured using the lower cutting edge 17 . It is possible to use it as the main cutting edge. The portion of the lower cutting edge 17 that extends from the second end 21a to the second side surface 25 is not used as a bevel penetration blade when performing an inclined penetration machining using the lower cutting edge 17 . It is possible.

7 , when viewed from the front of the upper surface 9 , the first side surface 23 has a tip region 29 sandwiched between the first end 19a and the second end 21a. You can take it. In addition, when viewed from the front of the upper surface 9 , the front end region 29 may be depressed toward the rear end 1a. More specifically, when viewed from the front of the upper surface 9 , the front end region 29 is on the rear end 1a side rather than the imaginary straight line L1 connecting the first end 19a and the second end 21a. It may be recessed toward the rear end 1a so as to be located in the

When viewed from the front of the upper surface 9, when the front end region 29 is recessed toward the rear end 1a, compared with the case where the front end region 29 is linear, the axial rake is reduced to a small negative value. It's easy to value. Therefore, while avoiding that the side surface 13 (1st side surface 23) of the insert 5 comes into contact with a workpiece, machinability is high.

8 and 12 , when viewed from the front of the upper surface 9 , a cross-section passing through the first end 19a and orthogonal to the first upper side 19 is a first cross-section it's good too In the first cross section, the side surface 13 (the first side surface 23 ) may have a concave shape. In this case, it is difficult for the side surface 13 (first side surface 23) to contact the workpiece.

8 and 13 , when viewed from the front of the upper surface 9 , a cross-section passing through the second end 21a and orthogonal to the first lower side 21 is a second cross-section it's good too In the second cross section, the side surface 13 (the first side surface 23 ) may have a concave shape. In this case, it is difficult for the side surface 13 (first side surface 23) to contact the workpiece.

As in the non-limiting example shown in FIG. 11 , when viewed from the front (viewed from the side) of the first side surface 23 , the first upper side 19 may have a convex shape protruding upward. In addition, when viewed from the front of the first side surface 23 , the first upper side 19 may have a third end 19b positioned furthest from the lower surface 11 . When viewed from the front of the first side surface 23 , the third end 19b may be located directly above the second end 21a. In these cases, when manufacturing a cutting work using the upper cutting edge 15, the second end 21a hardly comes into contact with the work piece due to the third end 19b. In addition, when manufacturing a cutting work using the lower cutting edge 17, it is difficult for the 3rd stage 19b to contact a workpiece by the 2nd stage 21a.

In addition, the positional relationship of the 3rd stage 19b with respect to the 2nd stage 21a mentioned above is the 2nd stage 21a and the 3rd stage 19b when seen from the front of the 1st side surface 23. In other words, it may be said that the imaginary straight line L2 to connect is parallel to the central axis O2. Parallelism is not limited to strict parallelism, and may mean allowing an inclination of about +/-5 degrees.

When viewed from the front of the first side surface 23 , the first lower edge 21 may have a convex shape protruding downward. In addition, when viewed from the front of the first side surface 23 , the first lower side 21 may have a fourth end 21b positioned furthest from the upper surface 9 . When viewed from the front of the first side surface 23 , the fourth end 21b may be located just below the first end 19a. In these cases, when manufacturing a cutting work using the upper cutting edge 15, the fourth end 21b hardly comes into contact with the work piece due to the first end 19a. In addition, when manufacturing a work piece using the lower cutting edge 17, the 1st end 19a hardly comes into contact with a workpiece by the 4th stage 21b.

In addition, the positional relationship of the 4th stage 21b with respect to the 1st stage 19a mentioned above is the 1st stage 19a and the 4th stage 21b when seen from the front of the 1st side surface 23. In other words, it may be said that the imaginary straight line L3 to connect is parallel to the central axis O2.

The upper surface 9 may have the upper inclined surface 31 and the upper flat surface 33 like an example which is not limited to shown in FIG. The upper inclined surface 31 may be located along the upper cutting edge 15 . In addition, the upper inclined surface 31 may come closer to the lower surface 11 as it moves away from the upper cutting edge 15 . The upper flat surface 33 may be closer to the center (center) of the upper surface 9 than the upper inclined surface 31 . The upper flat surface 33 may be a flat surface. The flatness may be generally flat, and it is not necessary to be flat in a strict sense.

The upper inclined surface 31 may be used as a rake area when cutting a workpiece using the upper cutting edge 15 . In addition, the upper flat surface 33 is a case where the workpiece is cut using the lower cutting edge 17 , and when the insert 5 is fixed to the holder 3 , the surface that abuts (contacts) the holder 3 . may be used as In this case, the upper flat surface 33 may be positioned as a seat surface. Further, the upper flat surface 33 may be perpendicular to the central axis O2. The vertical is not strictly vertical, and may mean allowing a range of about 90°±5°.

The upper flat surface 33 may have a fifth end 33a positioned on the side of the tip 1b. More specifically, the upper flat surface 33 may have a fifth end 33a located on the side of the most tip 1b of the upper flat surface 33 . The fifth end 33a may be located closer to the third side surface 27 than the second side surface 25 . In other words, the interval between the fifth end 33a and the third side surface 27 may be smaller than the interval between the fifth end 33a and the second side surface 25 . In the case where the upper flat surface 33 is used as a seat surface for the holder 3 , when the fifth stage 33a is positioned above, the fifth stage 33a is the outer periphery of the rotary tool 1 . easy to be located nearby. Therefore, the insert 5 is easily held in the holder 3 stably.

The third side surface 27 may be located closer to the fifth end 33a than the first end 19a. In other words, the interval between the third side surface 27 and the fifth end 33a may be smaller than the interval between the third side surface 27 and the first end 19a. In the case where the upper flat surface 33 is used as the seat surface, when the fifth end 33a is positioned above, the insert 5 is more likely to be held in the holder 3 more stably.

The lower surface 11 may have the lower inclined surface 35 and the lower flat surface 37 like a non-limiting example shown in FIG. The lower bevel 35 may be located along the lower cutting edge 17 . Further, the lower inclined surface 35 may come closer to the upper surface 9 as it moves away from the lower cutting edge 17 . The lower flat surface 37 may be located closer to the center (center) of the lower surface 11 than the lower inclined surface 35 . The lower flat surface 37 may be a flat surface.

The lower inclined surface 35 may be used as a rake area when cutting a workpiece using the lower cutting edge 17 . In addition, the lower flat surface 37 is a case where the workpiece is cut using the upper cutting edge 15, and when the insert 5 is fixed to the holder 3, the surface that abuts (contacts) the holder 3 may be used as In this case, the lower flat surface 37 may be positioned as a seat surface. Further, the lower flat surface 37 may be perpendicular to the central axis O2.

The lower flat surface 37 may have a sixth end 37a located on the side of the tip 1b. More specifically, the lower flat surface 37 may have a sixth end 37a positioned on the side of the most tip 1b of the lower flat surface 37 . The sixth end 37a may be located closer to the second side surface 25 than the third side surface 27 . In other words, the interval between the sixth end 37a and the second side surface 25 may be smaller than the interval between the sixth end 37a and the third side surface 27 . In the case where the lower flat surface 37 is used as a seat surface for the holder 3 , when the sixth stage 37a is positioned above, the sixth stage 37a is the outer periphery of the rotary tool 1 . easy to be located nearby. Therefore, the insert 5 is easily held in the holder 3 stably.

The second side surface 25 may be located closer to the sixth end 37a than the second end 21a. In other words, the interval between the second side surface 25 and the sixth end 37a may be smaller than the interval between the second side surface 25 and the second end 21a. In the case where the lower flat surface 37 is used as the seat surface, when the sixth end 37a is positioned above, the insert 5 is more likely to be held in the holder 3 more stably.

The insert 5 may have a through hole 39 . It is possible that the through hole 39 is used when fixing the insert 5 to the holder 3 , for example for inserting a screw. In addition, when fixing the insert 5 to the holder 3, you may use a clamp member instead of a screw, for example.

The through hole 39 may be an opening in a region located on opposite sides of the side surface 13 , or may be an opening in the upper surface 9 and the lower surface 11 . As in the non-limiting example shown in FIG. 6 , the through hole 39 may be an opening in the center of the upper surface 9 and the center of the lower surface 11 . The central axis of the through hole 39 may be an imaginary straight line passing through the center of the upper surface 9 and the center of the lower surface 11 . In other words, the central axis of the through hole 39 may coincide with the central axis O2 of the insert 5 .

The insert 5 may be mounted in the pocket 7 such that at least a part of the upper cutting edge 15 or the lower cutting edge 17 protrudes from the holder 3 . For example, the insert 5 may be mounted on the holder 3 so that the upper cutting edge 15 protrudes from the holder 3 toward the workpiece. In this case, the lower surface 11 and the side surface 13 may abut against the holder 3 .

The insert 5 may be attached to the pocket 7 by means of a screw 41 . That is, the screw 41 is inserted into the through hole 39 of the insert 5, the tip of the screw 41 is inserted into the screw hole formed in the pocket 7, and the screw 41 is fixed to the screw hole. By doing so, the insert 5 may be attached to the holder 3 .

As a material of the holder 3, steel, cast iron, etc. are mentioned, for example. When the material of the holder 3 is steel, the toughness of the holder 3 is high.

As a material of the insert 5, a cemented carbide alloy, a cermet, etc. are mentioned, for example. Examples of the composition of the cemented carbide include WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co. Here, WC, TiC and TaC may be hard particles, and Co may be a bonding phase.

In addition, the cermet may be a sintered composite material in which a metal is composited with a ceramic component. As an example of the cermet, a titanium compound containing titanium carbide (TiC) or titanium nitride (TiN) as a main component is exemplified. It goes without saying that the material of the insert 5 is not limited to the above composition.

The surface of the insert 5 may be coated with a film using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method. Examples of the composition of the film include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and alumina (Al ₂ O ₃ ).

<Method for manufacturing the cut product>

Next, the manufacturing method of the one-sided cut-out 203 of this indication is demonstrated using FIGS. 14-16.

The work piece 203 may be produced by cutting the work material 201 . The manufacturing method of the cutting work 203 may be equipped with the following process.

in other words,

(1) a step of rotating the rotary tool 1 represented by the non-limiting embodiment;

(2) a step of bringing the rotating tool 1 into contact with the workpiece 201;

(3) You may provide the process of dropping the rotating tool 1 from the workpiece 201.

Specifically, as in the non-limiting example shown in FIG. 14 , first, while rotating the rotary tool 1 in the Y1 direction around the rotary shaft O1, it may be relatively close to the workpiece 201 . Next, like a non-limiting example shown in FIG. 15 , the upper cutting edge 15 of the rotary tool 1 may be brought into contact with the work material 201 to cut the work material 201 . In addition, you may keep the rotating tool 1 relatively far from the work material 201 like an example which is not limited shown in FIG.

When passing through the above steps, it becomes possible to exhibit excellent workability. Specifically, in the non-limited method of manufacturing the one-sided cutting work 203 of the present disclosure, when the rotary tool 1 is used, the side surface 13 of the insert 5 is in contact with the workpiece 201 . While avoiding it, the machinability is also high. Therefore, it becomes possible to obtain the cutting work piece 203 with high precision of a finished surface.

In addition, in the example which is not limited to FIGS. 14-16, each process WHEREIN: Although the workpiece 201 is fixed and the rotating tool 1 is moved, it is not limited to this form of course.

For example, in the step (1), the work material 201 may be brought close to the rotary tool 1 . Similarly, in the step (3), the workpiece 201 may be moved away from the rotary tool 1 . In the case of continuing cutting, the process of maintaining the rotated state of the rotating tool 1 and making the insert 5 upper cutting edge 15 contact with the different location of the workpiece 201 may be repeated.

Examples of the material of the workpiece 201 include carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metals.

1 ... rotary tool 1a ... rear end
1b... Tip 3... Holder
5...Cutting inserts (inserts) 7...Pockets
9... Top 11... Bottom
13... side 15... upper cutting edge
17... Lower cutting edge 19... First upper edge
19a ... Stage 1 19b ... Stage 3
21··· 1st lower side 21a ··· 2nd stage
21b ... Column 4 23 ... Aspect 1
25... the second aspect 27... the third aspect
29...tip area 31...upper slope
33...Upper flat surface 33a... 5th stage
35 ... Lower slope 37 ... Lower flat surface
37a ... 6th stage 39 ... through hole
41... Screw 201... Workpiece
203···Cutting workpiece O1···Rotation axis
O2... central axis

Claims (10)

A rotary tool extending from a rear end to a leading end along a rotation axis, the rotary tool comprising:
A holder having a cylindrical shape extending along the axis of rotation and having a pocket located on the side of the tip;
having a cutting insert positioned in the pocket;
The cutting insert is
an upper surface positioned in front of the rotational direction of the rotating shaft and having a first upper side positioned on the side of the tip;
a lower surface having a first lower side located on the opposite side of the upper surface and located on the side of the tip;
a side surface positioned between the upper surface and the lower surface;
an upper cutting edge positioned on the first upper edge;
It has a lower cutting edge located on the first lower side,
The side is
a first side surface located on the side of the tip;
a second side surface positioned on the outer periphery of the holder;
and a third side surface located on the inner peripheral side of the holder,
The first upper side has a convex shape protruding toward the tip, and has a first end located on the side of the tip,
The first end is located closer to the third side than the second side,
The first lower side has a convex shape protruding toward the tip, and has a second end located on the side of the tip,
The second end is located closer to the second side than the third side,
When viewed from the front of the upper surface, the first side surface has a tip region fitted between the first end and the second end, and the tip region is recessed toward the rear end. The method of claim 1,
When viewed from the front of the upper surface, a cross-section passing through the first end and orthogonal to the first upper side is the first cross-section,
The rotary tool according to the first cross-section, wherein the side surface has a concave shape. 3. The method according to claim 1 or 2,
When viewed from the front of the upper surface, a cross-section passing through the second end and orthogonal to the first lower side is a second cross-section,
The rotary tool in the second cross-section, wherein the side surface is concave. 4. The method according to any one of claims 1 to 3,
When viewed from the front of the first side,
The first upper side has a convex shape protruding upward, and has a third end positioned furthest from the lower surface,
and the third end is located directly above the second end. 5. The method according to any one of claims 1 to 4,
When viewed from the front of the first side,
The first lower side has a convex shape protruding downward, and has a fourth end positioned furthest from the upper surface,
and the fourth end is located directly below the first end. 6. The method according to any one of claims 1 to 5,
The upper surface is
An upper inclined surface positioned along the upper cutting edge and closer to the lower surface as it moves away from the upper cutting edge;
It has a flat upper flat surface located closer to the center of the upper surface than the upper inclined surface,
The upper flat surface has a fifth end located on the side of the tip,
and the fifth end is located closer to the third side than the second side. 7. The method of claim 6,
and the third side surface is located closer to the fifth end than the first end. 8. The method according to any one of claims 1 to 7,
If the above is,
a lower inclined surface positioned along the lower cutting edge and approaching the upper surface as it moves away from the lower cutting edge;
It has a flat lower flat surface located closer to the center of the lower surface than the lower inclined surface,
The lower flat surface has a sixth end located on the side of the tip,
and the sixth end is located closer to the second side than to the third side. 9. The method of claim 8,
The second side of the rotary tool is located closer to the sixth end than the second end. A step of rotating the rotary tool according to any one of claims 1 to 9;
a step of bringing the rotating tool into contact with a workpiece;
and dropping the rotary tool from the workpiece.

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